Forked-Crossing Metasurface for Multi-Band Polarization Conversion with Distinct Bandwidths

Area of Science:

• Electromagnetics and Metamaterials
• Applied Physics

Background:

• Metasurfaces offer unique electromagnetic properties.
• Efficient polarization conversion is crucial for advanced wireless systems.

Purpose of the Study:

• To design and demonstrate a reflective, multi-band metasurface polarization converter.
• To achieve high polarization conversion ratio (PCR) across multiple frequency bands.

Main Methods:

• Utilized a forked-crossing patch array design for the metasurface.
• Conducted simulations and experimental verifications.
• Analyzed quality-factor (Q-factor) to characterize frequency responses.

Main Results:

• Achieved PCR >90% in five bands: 4.71-5.44 GHz, 7.26-9.55 GHz, 11.62-12.6 GHz, 13.33-13.46 GHz, and 15.61-15.62 GHz.
• Demonstrated hybrid Q-factor behavior, combining wideband (low Q) and narrowband (high Q) responses.
• Observed distinct resonances for high conversion efficiency.

Conclusions:

• The proposed metasurface exhibits versatile performance, suitable for complex electromagnetic applications.
• The design integrates wideband and selective narrowband polarization conversion capabilities.
• Ideal for multifunctional radar, communication, and sensing systems requiring spectral control.